PCB may refer to:
Science and technology Polychlorinated biphenyl, an organic chlorine compound, now recognized as an environmental toxin and classified as a persistent organic pollutant Printed circuit board, a board used in electronics Plenum chamber burning, in some jet engines Papillary carcinomas of the breast, rare forms of the breast cancers
Computing PCB (software), software to design printed circuit boards PCBoard, bulletin board software for MS-DOS Process control block, an operating system data structure Precompiled Binary
Organizations Political parties Bolshevik Communist Party (), a Mexican political party in the 1960s Communist Party of Belgium (), until splitting in 1989 Communist Party of Belgium (1989)(), one of the successors to that party Communist Party of Bolivia () Brazilian Communist Party ()
Other organizations Pacific Coast Borax Company, an American mining company Pakistan Cricket Board, national regulatory board for cricket in Pakistan PCB Piezotronics, a manufacturer of piezoelectric sensors Pharmacy Council of Bangladesh Police Complaints Board, in England and Wales
Places Panama City Beach, Florida, United States Pondok Cabe Airport (IATA code), Indonesia
Other uses Penetration-cum-blast, ammunition type for the Arjun tank's 120mm cannon Pablo Carreño Busta, Spanish tennis player Perfect Cherry Blossom, the seventh official game in the Japanese Touhou series by ZUN Public call box, a telephone booth PCB, a bible translation into Persian from 1995